Table !3. Body weights of Marshallese adult males in kilograms. Standard Atoll Number Utirik* Mean 9 Bikini? 69 18 Rongelap* 71.9 22 Enewetak? TOTAL 7 179 Minimum Maximum 12.9 59.5 92.7 9.2 46.4 12.4 61.2% 130 deviation 14 69.8° 50 100.5 37__ 126 86.8 37 126 4 Reference 28. D Reference 27. C Weighted mean. THE ?°sR METHODOLOGY Bone-marrow doses and dose rates are calculated in two steps. First, the model of Bennett 29-31 is used to correlate the 905, concentrations in diet with that in mineral bone. Second, the dosimetric model developed by Spiers?2 is used to calculate the bone-marrow dose rate from the concentration in mineral bone. Bennett's empirical model is developed from 706, concentrations found in foods and autopsy bone samples from New York and San Francisco. The concentrations in the diet are the concentrations expected to result from worldwide fallout. It uses as input the actual dietary 90¢,. concentration and the output is the actual 906, concentration in mineral bone determined from analysis of autopsy samples. It also includes age-dependent variations that allow us to make dose estimates for children as well as adults. An estimate of the calcium content of the normal Marshallese diet is listed in Table 15; the average intake is 0.8 g/d, which is very similar to the 0.9 g/d estimated for U.S. diets. The model is rather insensitive to calcium intake unless it greatly exceeds 1 g/d or is less than 0.3 g/d? Therefore, the similar intake of calcium of the overall Marshallese and U.S. diets would indicate no major problems in applying the 906, model to the Marshallese population. 33